Since 2010, Wyoming has required companies to disclose their fracking chemicals, but companies can still withhold trade secrets. Thanks to Earthjustice action, those companies now face a heavier burden of proof for their proprietary secrets. In 2012, Wyoming leaders passed requirements for testing of water near gas wells both before and after drilling.

Did You Know?

In April 2015, the Wyoming Oil and Gas Conservation Commission approved a measure to increase the setback between homes and wells to 500 feet, from 350 feet. Local landowners, hoping for a setback of a quarter mile, expressed frustration with the decision and vowed to continue fighting.

Last Updated: September 29, 2015

The Fracked Fact Quiz

At one gas well, levels of benzene were found to be how many times above the minimum risk level set by a federal health agency?

zero times

10 times

12,000 times

A 2014 study found the carcinogen benzene levels at one gas well in Wyoming at 12,000 times above the minimum risk level set by the U.S. Agency for Toxic Substances and Disease Registry.